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Abstract: La3Ni2O7 oxide has been synthesized by a facile sol–gel method using a nonionic surfactant (EO)106(PO)70(EO)106 tri-block copolymer (Pluronic F127) as the chelating agent. The pure phase of La3Ni2O7 has been obtained by sintering at temperatures of 1100°C for 12h. La3Ni2O7 oxide as a cathode presents no visible reaction with an Y2O3-stabilized ZrO2 (YSZ) electrolyte. The electrochemical performance of the prepared oxide as a cathode has been investigated. Area specific resistance of La3Ni2O7 material on YSZ electrolyte is as low as 0.39Ωcm2 at 750°C. Furthermore, an anode-supported single-cell configuration of NiO–YSZ/YSZ/La3Ni2O7 has been achieved a maximum power density of 848mWcm−2 at 750°C. The cell performance was stable under a constant current of 0.6Acm−2 for over 30h at 750°C. These results therefore suggest that La3Ni2O7 synthesized by this sol–gel method is a highly promising cathode material for applications in IT-SOFCs. [Copyright &y& Elsevier]